A light-emitting element with high emission efficiency is provided. A light-emitting element with a long lifetime is provided. The light-emitting element includes an anode; a hole-transport layer over the anode, containing a hole-transport compound and a compound; a light-emitting layer over the hole-transport layer, containing a host material and a guest material; and a cathode over the light-emitting layer. The host material is an electron-transport compound. The guest material and the compound are each independently a phosphorescent compound or a thermally activated delayed fluorescence material. A peak of an emission spectrum of the compound is on a shorter wavelength side than a peak of an emission spectrum of the guest material. Only the guest material emits light.
提供了一种具有高发射效率的发光元件。提供了一种具有长寿命的发光元件。该发光元件包括:阳极;覆盖在阳极上的传输孔层,包含传输孔化合物和化合物;覆盖在传输孔层上的发光层,包含主体材料和客体材料;以及覆盖在发光层上的阴极。主体材料是电子传输化合物。客体材料和化合物各自独立地是
磷光化合物或热激发延迟荧光材料。化合物的发射光谱峰位于客体材料的发射光谱峰的较短波长侧。只有客体材料发出光。